Display module, backplane assembly and display apparatus

Abstract

A display module, comprising: a display panel, a first alignment mark being arranged on the back side of the display panel; a backplane, the backplane being located on the back side of the display panel, and the backplane being provided with a closed through hole opposite to the first alignment mark; and an adhesion layer, which is located between the backplane and the display panel and bonds the backplane to the display panel, wherein a filling member is arranged in the closed through hole.

Description

Display module, back panel assembly and display device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority from Chinese patent application No. 202311076315.X, the contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of display technology, and in particular to a display module, a back panel assembly, and a display device. Background Art

[0004] Currently, the utilization rate of OLED screens is gradually increasing, and the specification requirements of OLED display modules by complete machine suppliers are also gradually increasing with market development, such as in the field of intelligent cockpits in automobiles. With the emergence of non-embedded screens, users' demand for narrow bezels is gradually increasing. Conventional products using COF bending can no longer meet the high-quality demand for narrow bezels. Some technologies use pad bending technology to meet this demand.

[0005] In related technologies, the display module needs to capture alignment marks for alignment and precision control in corresponding processes such as pad bending. The alignment marks are set in the corner areas of the display panel. In this area, the back panel needs to be opened to avoid the alignment marks to expose the alignment marks.

[0006] Summary of the Invention

[0007] The present disclosure aims to solve at least one of the technical problems existing in the prior art. To this end, the present disclosure provides a display module, a back panel assembly, and a display device having the display module.

[0008] On the one hand, the present disclosure provides a display module, comprising: a display panel, wherein a first alignment mark is provided on the back side of the display panel; a back plate, wherein the back plate is located on the back side of the display panel and a closed through hole is formed on the back plate opposite to the first alignment mark; and an adhesive layer, which is located between the back plate and the display panel and adheres the back plate to the display panel, wherein a filler is provided in the closed through hole.

[0009] In some embodiments, the light transmittance of the filling member is greater than 90%.

[0010] In some embodiments, the filler is formed by an injection molding process, and a material of the filler includes polycarbonate (PC), polymethyl methacrylate (PMMA), or sapphire.

[0011] In some embodiments, the filler is a conductive adhesive.

[0012] In some embodiments, the display panel has a bendable area, the back panel has a pattern area opposite to the bendable area, the pattern area is provided with a plurality of slits parallel to each other, and at least one of the plurality of slits is filled with a glue strip.

[0013] In some embodiments, at least one slit has a first end and a second end opposite to each other along its extension direction, wherein the first end is a closed end; and the second end is an open end and passes through the side of the back plate.

[0014] In some embodiments, the width of the first end portion is greater than the width of the second end portion.

[0015] In some embodiments, the first ends and the second ends of the plurality of slits are alternately arranged on either side along an extending direction of the plurality of slits.

[0016] In some embodiments, the light transmittance of the adhesive strip is less than 10%.

[0017] In some embodiments, in a cross section perpendicular to the back plate and perpendicular to an extending direction of the slit, the width of the adhesive strip gradually increases in a direction away from the adhesive layer.

[0018] On the other hand, the present disclosure provides a backplane assembly, comprising: a backplane having a closed through hole, the position of the closed through hole corresponding to the position of a first alignment mark on the back side of the display panel to be adhered; an adhesive layer located on one side of the backplane and configured to adhere the backplane to the display panel; and a protective film located on a side of the adhesive layer away from the backplane, wherein a filler is provided in the closed through hole.

[0019] In some embodiments, the light transmittance of the filling member is greater than 90%.

[0020] In some embodiments, the filler is formed by an injection molding process, and a material of the filler includes polycarbonate (PC), polymethyl methacrylate (PMMA), or sapphire.

[0021] In some embodiments, the display panel has a bendable area, the back panel has a pattern area opposite to the bendable area, the pattern area is provided with a plurality of slits parallel to each other, and at least one of the plurality of slits is filled with a glue strip.

[0022] In some embodiments, at least one slit has a first end and a second end opposite to each other along its extension direction, wherein the first end is a closed end; and the second end is an open end and passes through the side of the back plate.

[0023] In some embodiments, the width of the first end portion is greater than the width of the second end portion.

[0024] In some embodiments, the first ends and the second ends of the plurality of slits are alternately arranged on either side along an extending direction of the plurality of slits.

[0025] In some embodiments, the light transmittance of the adhesive strip is less than 10%.

[0026] In some embodiments, in a cross section perpendicular to the back plate and perpendicular to an extending direction of the slit, the width of the adhesive strip gradually increases in a direction away from the adhesive layer.

[0027] On the other hand, the present disclosure provides a display device comprising the display module according to any one of the above embodiments.

[0028] Additional aspects and advantages of the present disclosure will be given in part in the description that follows and, in part, will be obvious from the description that follows, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] FIG1 is a schematic diagram of a display module according to some embodiments of the present disclosure, with a bent portion deployed;

[0031] FIG2 is a partial enlarged view of the display module shown in FIG1 ;

[0032] FIG3 is another partial schematic diagram of a display module according to some embodiments of the present disclosure;

[0033] FIG4 is another partial schematic diagram of a display module according to some embodiments of the present disclosure;

[0034] FIG5 is another schematic diagram of a display module according to some embodiments of the present disclosure, wherein the bending portion is arranged in a bent manner;

[0035] FIG6 is a partial schematic diagram of a display module according to some embodiments of the present disclosure;

[0036] FIG7 is a cross-sectional view taken along line AA shown in FIG6;

[0037] FIG8 is another partial schematic diagram of a display module according to some embodiments of the present disclosure;

[0038] FIG9 is a schematic diagram of a display panel, a backplane, and a binding structure according to some embodiments of the present disclosure;

[0039] FIG10 is a partial enlarged view of portion B shown in FIG9;

[0040] FIG11 is a cross-sectional view of a display module according to some embodiments of the present disclosure;

[0041] FIG12 is another schematic diagram of a display panel, a backplane, and a binding structure according to some embodiments of the present disclosure;

[0042] FIG13 is a partial schematic diagram of a display module according to some embodiments of the present disclosure;

[0043] FIG14 is a cross-sectional view taken along line BB shown in FIG13;

[0044] FIG15 is a partial schematic diagram of a display module according to some embodiments of the present disclosure;

[0045] FIG16 is a cross-sectional view taken along line CC shown in FIG15;

[0046] FIG17 is another cross-sectional view taken along line CC shown in FIG15;

[0047] FIG18 is a schematic diagram of a backplane assembly according to some embodiments of the present disclosure;

[0048] FIG19 is a cross-sectional view taken along line DD shown in FIG18;

[0049] FIG20 is a schematic diagram of a backplane assembly according to some embodiments of the present disclosure;

[0050] FIG21 is a cross-sectional view taken along line EE shown in FIG20;

[0051] FIG22 is another cross-sectional view taken along line EE shown in FIG20. DETAILED DESCRIPTION

[0052] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure.

[0053] The disclosure below provides many different embodiments or examples for realizing different structures of the present disclosure. In order to simplify the disclosure of the present disclosure, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present disclosure. In addition, the present disclosure may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present disclosure provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the applicability of other processes and / or the use of other materials.

[0054] Hereinafter, a display module 100 according to an embodiment of the present disclosure will be described with reference to the accompanying drawings.

[0055] As shown in Figures 1 and 5, the display module 100 includes a display panel 1 and a back panel 2. The back side of the display panel 1 is provided with a first alignment mark 1a. The back panel 2 is provided on the back side of the display panel 1. The back panel 2 has a certain effect of enhancing the structural strength of the display module 100. A first through hole 2a opposite to the first alignment mark 1a is formed on the back panel 2. The first through hole 2a can penetrate the back panel 2 along the thickness direction of the back panel 2. The first through hole 2a exposes the first alignment mark 1a to facilitate alignment identification in subsequent processes. The back panel 2 has a plurality of side walls connected in sequence along the head and tail, and the plurality of side walls include the same The first side wall 2b and the second side wall 2c are connected, and the first through hole 2a is adjacent to the first side wall 2b and the second side wall 2c relative to the other side walls, then the distance between the first through hole 2a and the first side wall 2b is smaller than the distance between the first through hole 2a and the other side walls except the first side wall 2b and the second side wall 2c, and the distance between the first through hole 2a and the second side wall 2c is smaller than the distance between the first through hole 2a and the other side walls except the first side wall 2b and the second side wall 2c; illustratively, the first through hole 2a can be arranged adjacent to the corner formed by the first side wall 2b and the second side wall 2c.

[0056] In an embodiment of the present application, the display panel 1 has a display side and a back side that are relatively arranged in its thickness direction (for example, the direction perpendicular to the paper in Figure 1), and the user can view the content displayed by the display panel 1 on the display side; the thickness direction of the back panel 2 can be understood as the thickness direction of the display panel 1, or the thickness direction of the display module 100.

[0057] In combination with Figures 1 to 3, the peripheral wall of the first through hole 2a is spaced apart from the first side wall 2b, so that the back plate 2 forms a first protective portion 21 between the peripheral wall of the first through hole 2a and the first side wall 2b, and the opposite side walls of the first protective portion 21 are respectively the peripheral wall of the first through hole 2a and the second side wall 2b, and the first protective portion 21 extends at least to be flush with the display panel 1 along the extension direction of the first side wall 2b; and / or, the peripheral wall of the first through hole 2a is spaced apart from the second side wall 2c, so that the back plate 2 forms a second protective portion 22 between the peripheral wall of the first through hole 2a and the second side wall 2c, and the opposite side walls of the second protective portion 22 are respectively the peripheral wall of the first through hole 2a and the second side wall 2c, and the second protective portion 22 extends at least to be flush with the display panel 1 along the extension direction of the second side wall 2c.

[0058] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0059] In some examples, in combination with Figures 1 and 2, when the back panel 2 includes the first protecting portion 21 and does not include the second protecting portion 22, the first protecting portion 21 extends along the extension direction of the first side wall 2b at least to be flush with the display panel 1, then the first protecting portion 21 extends along the extension direction of the first side wall 2b to be flush with the edge of the display panel 1 corresponding to the second side wall 2c, or the first protecting portion 21 extends along the extension direction of the first side wall 2b to exceed the edge of the display panel 1 corresponding to the second side wall 2c, so that the first protecting portion 21 can cover the corners of the display panel 1, then the projection of the corner part of the display panel 1 along the thickness direction of the display panel 1 overlaps with at least part of the projection of the first protecting portion 21 along the thickness direction of the display panel 1, so that the first protecting portion 21 provides strong support for the corners of the display panel 1, and the first protecting portion 21 can protect the display panel 1. The edges and corners of the display panel 1 are used to avoid the risk of damage to the display panel 1 (for example, film peeling occurs at the edges and corners of the display panel 1) caused by collision during the assembly or transportation of the display module 100, thereby causing defects in the display module 100 and affecting the display function of the display panel 1 (for example, GDS occurs in the display module 100, black spots appear in the display area of ​​the display module 100 or the black spots gradually grow until the display area of ​​the display module 100 fails; or, film peeling occurs at the edges and corners of the display panel 1, water vapor enters the display panel 1, causing part of the display area of ​​the display module 100 to fail to display; or, the edges and corners of the display panel 1 are subjected to external forces, resulting in cracks at the edges and corners, which cause the cracks to extend along the display panel 1 to the display area of ​​the display module 100 during trust testing or user use, resulting in GDS defects).

[0060] Therefore, the first protection part 21 can protect the corners of the display panel 1. When a collision occurs at the corners of the display panel 1, the first protection part 21 contacts other objects before the corners of the display panel 1, and the first protection part 21 has a certain width, so that the first protection part 21 has a certain strength. When the first protection part 21 is hit, its own deformation is small, or its own shape remains basically unchanged, which can reduce the risk of damage to the corners of the display panel 1 by external forces, reduce damage to the corners of the display panel 1 by other objects, reduce damage to the display panel 1 by external forces, improve the overall strength of the corners of the display module 100, improve product stability, product quality and competitiveness, and reduce the risk of defects in the display module 100.

[0061] For example, in the examples of Figures 1 and 2, the display panel 1 and the back panel 2 are roughly square structures, the first side wall 2b and the second side wall 2c of the back panel 2 are arranged to intersect, the first through hole 2a is arranged adjacent to the first side wall 2b, and the first through hole 2a passes through the second side wall 2c, the peripheral wall of the first through hole 2a is formed into an open ring, for example, the peripheral wall of the first through hole 2a is a semicircular opening, and a first protective portion 21 is formed between the peripheral wall of the first through hole 2a and the first side wall 2b, and the first protective portion 21 extends along the extension direction of the first side wall 2b to be flush with the edge of the display panel 1 corresponding to the second side wall 2c, so as to cover the corners of the display panel 1; thereby, the first protective portion 21 can protect the corners of the display panel 1 to avoid damage to the corners of the display panel 1 due to collision, etc.

[0062] In some examples, in combination with Figures 1 and 3, when the back panel 2 includes the second protection portion 22 and does not include the first protection portion 21, the second protection portion 22 extends along the extension direction of the second side wall 2c at least to the same level as the edge of the display panel 1 corresponding to the first side wall 2b, then the second protection portion 22 extends along the extension direction of the second side wall 2c to the same level as the display panel 1 or extends beyond the edge of the display panel 1 corresponding to the first side wall 2b, so that the second protection portion 22 can cover the corners of the display panel 1, then the projection of the corner part of the display panel 1 along the thickness direction of the display panel 1 overlaps with at least part of the projection of the second protection portion 22 along the thickness direction of the display panel 1, so that the second protection portion 22 provides strong support for the corners of the display panel 1, and can protect the corners of the display panel 1 to avoid the risk of damage to the display panel 1 and defective display module 100 caused by collision of the display panel 1 during assembly or transportation of the display module 100.

[0063] Therefore, the second protection part 22 can protect the corners of the display panel 1. When a collision occurs at the corners of the display panel 1, the second protection part 22 contacts other objects before the corners of the display panel 1, and the second protection part 22 has a certain width, so that the second protection part 22 has a certain strength. When the second protection part 22 is hit, its own deformation is small, or its own shape remains basically unchanged, which can reduce the risk of damage to the corners of the display panel 1 by external forces, reduce damage to the corners of the display panel 1 by other objects, reduce damage to the display panel 1 by external forces, improve the overall strength of the corners of the display module 100, improve product quality and competitiveness, and reduce the risk of defects in the display module 100.

[0064] For example, in combination with Figures 1 and 3, the display panel 1 and the back panel 2 are roughly square structures, the first side wall 2b and the second side wall 2c of the back panel 2 are arranged to intersect, the first through hole 2a is arranged adjacent to the second side wall 2c, and the first through hole 2a passes through the first side wall 2b, the peripheral wall of the first through hole 2a is formed into an open ring, for example, the peripheral wall of the first through hole 2a is a semicircular opening, and a second protective portion 22 is formed between the peripheral wall of the first through hole 2a and the second side wall 2c, and the second protective portion 22 extends along the extension direction of the second side wall 2c to be flush with the edge of the display panel 1 corresponding to the first side wall 2b, so as to cover the corners of the display panel 1; thereby, the second protective portion 22 can protect the corners of the display panel 1 to avoid damage to the corners of the display panel 1 due to collision, etc.

[0065] In some examples, in combination with Figures 1 and 4, when the back panel 2 includes a first protective portion 21 and a second protective portion 22, the first protective portion 21 extends at least flush with the display panel 1 along the extension direction of the first side wall 2b, and the second protective portion 22 extends at least flush with the display panel 1 along the extension direction of the second side wall 2c, so that the first protective portion 21 and the second protective portion 22 can cover the corners of the display panel 1 to provide strong support for the corners of the display panel 1, and can protect the corners of the display panel 1 to avoid the risk of damage to the display panel 1 and defects in the display module 100 caused by collision of the display panel 1 during assembly or transportation of the display module 100.

[0066] Therefore, the first protection part 21 and the second protection part 22 can protect the corners of the display panel 1. When a collision occurs at the corners of the display panel 1, the first protection part 21 and / or the second protection part 22 contacts other objects before the corners of the display panel 1, and the first protection part 21 and the second protection part 22 have a certain width, so that the first protection part 21 and the second protection part 22 have a certain strength. When the first protection part 21 and the second protection part 22 are hit, their own deformation is small, or their own shape remains basically unchanged, which can reduce the risk of damage to the corners of the display panel 1 by external forces, reduce damage to the corners of the display panel 1 by other objects, reduce damage to the display panel 1 by external forces, improve the overall strength of the corners of the display module 100, improve product quality and competitiveness, and reduce the risk of defects in the display module 100.

[0067] Optionally, the first protection portion 21 and the second protection portion 22 may be connected as one body or be separately disposed adjacent to each other.

[0068] For example, in conjunction with Figures 1 and 4, the display panel 1 and the back panel 2 are generally square structures, the first side wall 2b and the second side wall 2c of the back panel 2 are arranged to intersect, the first through hole 2a is arranged adjacent to the first side wall 2b and the second side wall 2c, the peripheral wall of the first through hole 2a is formed into a closed ring, for example, the first through hole 2a is a circular opening, and a first protective portion 21 is formed between the first through hole 2a and the first side wall 2b, and the first protective portion 21 extends along the extension direction of the first side wall 2b to the side corresponding to the second side wall of the display panel 1 2c, a second protecting portion 22 is formed between the first through hole 2a and the second side wall 2c, the second protecting portion 22 extends along the extension direction of the second side wall 2c to be flush with the edge of the display panel 1 corresponding to the first side wall 2b, and the first protecting portion 21 and the second protecting portion 22 are connected as a whole to cover the corners of the display panel 1; thus, the first protecting portion 21 and the second protecting portion 22 can protect the corners of the display panel 1 to avoid damage to the corners of the display panel 1 due to collision, etc.

[0069] Optionally, the number of first through holes 2a can be multiple. When the number of first through holes 2a is multiple, the protection parts (first protection part 21 and / or second protection part 22) corresponding to each first through hole 2a can be the same or different; for example, the back panel 2 is formed with two first through holes 2a, and the protection parts corresponding to the two first through holes 2a are both the first protection part 21, or both are the second protection part 22, or both are the first protection part 21 and the second protection part 22, or, the protection part corresponding to one of the first through holes 2a is the first protection part 21, and the protection part corresponding to the other first through hole 2a is the second protection part 22.

[0070] Optionally, there may be multiple first alignment marks 1a. When there is one first through hole 2a, the multiple first alignment marks 1a may be aligned with the same first through hole 2a. Alternatively, when there are multiple first through holes 2a, the multiple first alignment marks 1a may be aligned with different first through holes 2a. For example, if there are two first alignment marks 1a and one first through hole 2a, both first alignment marks 1a may be aligned with the first through hole 2a. Alternatively, if there are two first alignment marks 1a and two first through holes 2a, both first alignment marks 1a may be aligned with the first through hole 2a.

[0071] For example, in combination with Figures 1 to 4, the back panel 2 has two first side walls 2b and one second side wall 2c, and the second side wall 2c is respectively connected to the two first side walls 2b. The back side of the display panel 1 is provided with two first alignment marks 1a, the back panel 2 is provided on the back side of the display panel 1, and the back panel 2 is formed with two first through holes 2a.

[0072] As shown in Figures 1 and 2 , two first through holes 2a are disposed adjacent to two corresponding first side walls 2b in the extension direction of the second side wall 2c. Each first through hole 2a extends through the second side wall 2c, and the peripheral wall of the first through hole 2a is formed into an open ring. A first protective portion 21 is formed between the peripheral wall of each first through hole 2a and the corresponding first side wall 2b. Each first protective portion 21 extends along the extension direction of the corresponding first side wall 2b to be flush with the edge of the display panel 1 corresponding to the second side wall 2c, thereby covering a corner of the display panel 1. Thus, each first protective portion 21 can protect a corner of the display panel 1 to prevent damage to the corner of the display panel 1 due to collisions, etc.

[0073] Alternatively, as shown in FIG3 , two first through holes 2a are provided in the direction of extension of the first side wall 2b, respectively corresponding to the adjacent second side wall 2c. Each first through hole 2a penetrates the adjacent corresponding first side wall 2b. The peripheral wall of the first through hole 2a is formed into an open ring. A second protective portion 22 is formed between the peripheral wall of each first through hole 2a and the second side wall 2c. Each second protective portion 22 extends along the direction of extension of the second side wall 2c to be flush with the edge of the display panel 1 corresponding to the first side wall 2b, thereby covering a corner of the display panel 1. Thus, each second protective portion 22 can protect a corner of the display panel 1 to prevent damage to the corner of the display panel 1 due to collisions, etc.

[0074] Alternatively, as shown in Figure 4, each first through hole 2a is spaced apart from the corresponding first side wall 2b and the second side wall 2c, and the peripheral wall of each first through hole 2a is formed into a closed ring, and a first protecting portion 21 is formed between the peripheral wall of each first through hole 2a and the corresponding first side wall 2b, and each first protecting portion 21 extends along the extension direction of the corresponding first side wall 2b to be flush with the edge of the display panel 1 corresponding to the second side wall 2c, and a second protecting portion 22 is formed between the peripheral wall of each first through hole 2a and the second side wall 2c, and the second protecting portion 22 extends along the extension direction of the second side wall 2c to be flush with the edge of the display panel 1 corresponding to the first side wall 2b, and the second protecting portion 22 is connected to one first protecting portion 21 in the extension direction of the second side wall 2c; one of the first protecting portions 21 and one of the second protecting portions 22 cover one corner of the display panel 1, and the other first protecting portion 21 and the other second protecting portion 22 cover another corner of the display panel 1. Thus, the two first protection portions 21 and the two second protection portions 22 can protect the two corners of the display panel 1 to prevent the corners of the display panel 1 from being damaged due to collision or the like.

[0075] According to the display module 100 of the embodiment of the present disclosure, the peripheral wall of the first through hole 2a opposite to the first alignment mark 1a is spaced from the first side wall 2b to form a first protective portion 21, and / or the peripheral wall of the first through hole 2a is spaced from the second side wall 2c to form a second protective portion 22. The first protective portion 21 and / or the second protective portion 22 can cover the corners of the display panel 1 to protect the corners of the display panel 1. When a collision occurs at the corners of the display module 100, the first protective portion 21 and / or the second protective portion 22 contacts other objects before the corners of the display panel 1, which can reduce the risk of the corners of the display panel 1 being damaged by external forces, reduce damage to the corners of the display panel 1 by other objects, reduce damage to the corners of the display panel 1 by external forces, improve the overall strength of the corners of the display module 100, improve product quality and competitiveness, and reduce the risk of defects in the display module 100.

[0076] Optionally, the display panel 1 (PNL, Panel) may be a flexible display panel (such as a flexible OLED, etc.) or a rigid display panel.

[0077] It can be understood that the shape of the first through hole 2a is not limited, and the peripheral wall of the first through hole 2a can be a closed ring or an open ring; wherein, the open ring is formed with a gap compared to the closed ring, while the closed ring is not formed with a gap, and the open ring can be understood as a non-closed ring; the ring can be a polygonal ring, or a circular ring, or an elliptical ring, or a combination of a part of a polygonal ring and a part of a circular ring, etc., and the polygon can be a triangle, a square, or a pentagon, etc.

[0078] It is understood that the shape of the back plate 2 is not limited. For example, the shape of the back plate 2 can be polygonal, circular, or a combination of a portion of a polygon and a portion of a circle. Of course, it is understood that the shape and size of the back plate 2 are substantially compatible with the shape and size of the display panel 1 to ensure that the back plate 2 and the display panel 1 are matched and assembled.

[0079] Preferably, the first protection portion 21 extends along the extension direction of the first side wall 2b until it is flush with the display panel 1, and the second protection portion 22 extends along the extension direction of the second side wall 2c until it is flush with the display panel 1. Then, the first protection portion 21 is flush with the edge of the display panel 1 corresponding to the second side wall 2c, and the second protection portion 22 is flush with the edge of the display panel 1 corresponding to the first side wall 2b, so as to ensure that the first protection portion 21 and the second protection portion 22 do not exceed the outer contour of the display panel 1 in the extension direction, thereby avoiding the occurrence of adhesive overflow between the first protection portion 21 and the display panel 1, and / or between the second protection portion 22 and the display panel 1, and other appearance defects. Of course, preferably, the contour of the back panel 2 does not exceed the outer contour of the display panel 1, which can improve the appearance defects such as adhesive overflow between the back panel 2 and the display panel 1, and save subsequent processing steps.

[0080] In some embodiments, in combination with Figures 1-4, the back panel 2 has two first side walls 2b arranged opposite to each other along the first direction and second side walls 2c arranged opposite to each other along the second direction, each second side wall 2c is respectively connected to the two first side walls 2b, there are multiple first alignment marks 1a and the multiple first alignment marks 1a are arranged at intervals along the first direction, and the outermost two of the multiple first alignment marks 1a are the first mark and the second mark, respectively.

[0081] Among them, a first protective portion 21 is correspondingly provided at the first mark and the second mark, and the two first protective portions 21 extend at least flush with the display panel 1 along the second direction, so that the two first protective portions 21 respectively cover different corners of the display panel 1, and each first protective portion 21 provides strong support for the corresponding corner of the display panel 1, which can protect the corners of the display panel 1 to avoid the display panel 1 from colliding during the assembly or transportation of the display module 100, causing damage to the display panel 1 and causing risks of defects in the display module 100.

[0082] It can be seen that in the above technical solution, the first through hole 2a opposite to the first mark and the second mark can pass through the second side wall 2c.

[0083] Alternatively, the first mark and the second mark are respectively provided with a first protection portion 21 and a second protection portion 22, each first protection portion 21 extends at least flush with the display panel 1 along the second direction, and each second protection portion 22 extends at least flush with the display panel 1 along the first direction, so that the first mark is correspondingly provided with a first protection portion 21 and a second protection portion 22 covering one corner of the display panel 1, and the second mark is correspondingly provided with a first protection portion 21 and a second protection portion 22 covering another corner of the display panel 1, the first protection portion 21 and the second protection portion 22 respectively provide strong support for the corresponding corners of the display panel 1, and can protect the corners of the display panel 1 to avoid the risk of damage to the display panel 1 and defective display module 100 due to collision of the display panel 1 during assembly or transportation of the display module 100.

[0084] It can be seen that in the above technical solution, the first through hole 2a corresponding to the first mark and the second mark does not penetrate the corresponding first side wall 2b and the corresponding second side wall 2c.

[0085] Optionally, a second protection portion 22 is correspondingly provided at the first mark and the second mark, and the two second protection portions 22 can protect different corners of the display panel 1 .

[0086] For example, in combination with Figures 1 and 2, taking the first direction as the left-right direction in Figure 1 and the second direction as the front-back direction in Figure 1 as an example, the back panel 2 includes two first side walls 2b and two second side walls 2c, the two first side walls 2b are arranged opposite to each other along the left-right direction, the two second side walls 2c are arranged opposite to each other along the front-back direction, and the two first side walls 2b and the two second side walls 2c are connected end to end in sequence, and the back panel 2 is formed with two first through holes 2a, the two first through holes 2a are arranged at intervals along the left-right direction, the first through hole 2a on the left is opposite to the first mark, and the first through hole 2a on the right is opposite to the second mark.

[0087] The first through hole 2a on the left side is arranged adjacent to the first side wall 2b on the left side and passes through the second side wall 2c on the front side. The back panel 2 is formed with a first protective portion 21 between the peripheral wall of the first through hole 2a on the left side and the first side wall 2b on the left side. The first protective portion 21 extends in the front-to-back direction to be flush with the front end of the display panel 1. The first protective portion 21 on the left side covers the corresponding corner portion on the left side of the display panel 1, which can protect the corner portion on the left side to avoid the corner portion from colliding with the display panel 1 during the assembly or transportation of the display module 100, resulting in damage to the corner portion on the left side of the display panel 1 and causing risks of defective display module 100.

[0088] The first through hole 2a on the right side is arranged adjacent to the first side wall 2b on the right side and passes through the second side wall 2c on the front side. The back panel 2 is formed with a first protective portion 21 between the peripheral wall of the first through hole 2a on the right side and the first side wall 2b on the right side. The first protective portion 21 extends in the front-to-back direction to be flush with the front end of the display panel 1. The first protective portion 21 on the right side covers the corresponding corner portion on the right side of the display panel 1, which can protect the corner portion on the right side to avoid the corner portion from colliding with the display panel 1 during the assembly or transportation of the display module 100, resulting in damage to the corner portion on the right side of the display panel 1 and causing risks of defective display module 100.

[0089] Of course, the settings at the first mark and the settings at the second mark are not limited to this; one of the first mark and the second mark corresponds to the first protection part 21 and the other corresponds to the second protection part 22, or one of the first mark and the second mark corresponds to the first protection part 21 and the other corresponds to the first protection part 21 and the second protection part 22, or one of the first mark and the second mark corresponds to the second protection part 22 and the other corresponds to the first protection part 21 and the second protection part 22.

[0090] In some embodiments, as shown in Figures 2 to 4, when the back panel 2 is formed with a first protection portion 21, the minimum width a1 of the first protection portion 21 is greater than or equal to 500 μm, so as to ensure that the first protection portion 21 has an appropriate width, so that the first protection portion 21 has an appropriate strength to ensure that it is basically not deformed and its shape remains basically unchanged after a collision, thereby protecting the corners of the display panel 1 from damage caused by the collision. At the same time, the first protection portion 21 itself will basically not deform during transportation, thereby ensuring the reliability and safety of the back panel 2 during transportation; and / or, when the back panel 2 is formed with a second protection portion 22, the minimum width a2 of the second protection portion 22 is greater than or equal to 500 μm, so as to ensure that the second protection portion 22 has an appropriate width, so that the second protection portion 22 has an appropriate strength to ensure that it is basically not deformed and its shape remains basically unchanged after a collision, thereby protecting the corners of the display panel 1 from damage caused by the collision, thereby ensuring that the second protection portion 22 itself will basically not deform during transportation, thereby ensuring the reliability and safety of the back panel 2 during transportation.

[0091] Optionally, the minimum width a1 of the first protection portion 21 may be 500 μm, 600 μm, 700 μm, 800 μm, 900 μm, or 1000 μm, etc.; the minimum width a2 of the second protection portion 22 may be 500 μm, 600 μm, 700 μm, 800 μm, 900 μm, or 1000 μm, etc.

[0092] In some embodiments, as shown in Figure 4, the back panel 2 is formed with a first protective portion 21 and a second protective portion 22, and the first protective portion 21 and the second protective portion 22 are connected as an integrated structure, which can improve the overall structural strength of the first protective portion 21 and the second protective portion 22, so that the first protective portion 21 and the second protective portion 22 can better protect the corners of the display panel 1, and avoid the corners of the display panel 1 from being damaged by collision during transportation.

[0093] In some embodiments, the backplane 2 includes a heat sink for dissipating heat from the display panel 1, thereby dissipating heat for the display panel 1 and providing structural support, thereby meeting the heat dissipation and support requirements of the display panel 1. Exemplarily, the backplane 2 is the heat sink; or the backplane 2 includes the heat sink and other structures provided on the heat sink.

[0094] Optionally, the heat dissipation plate may be a metal plate, such as an aluminum plate.

[0095] In some embodiments, the display module 100 also includes a binding structure 3, which includes a bending portion 31 and a flat portion 32. In combination with Figures 9 to 12, the bending portion 31 is bent, and the flat portion 32 is provided on the back side of the display panel 1, and the two ends of the bending portion 31 are respectively connected to the display panel 1 and the flat portion 32. The first alignment mark 1a is located between the opposite end edges of the flat portion 32, and a second through hole 32a and a second alignment mark 32b are formed on the flat portion 32. The second through hole 32a is opposite to the first alignment mark 1a, so that the first alignment mark 1a can be observed through the second through hole 32a after the bending portion 31 is bent. The second alignment mark 32b is used to cooperate with the first alignment mark 1a to align the flat portion 32, thereby realizing the bending alignment of the bending portion 31.

[0096] For example, the second alignment mark 32b is aligned with the first alignment mark 1a, and the relative positions of the first alignment mark 1a and the second alignment mark 32b can be checked through the first through hole 2a and the second through hole 32a by a detection device (such as a CCD camera) to monitor the bending accuracy to ensure that the flat portion 32 is accurately aligned with the display panel 1 after bending.

[0097] Exemplarily, in conjunction with Figure 11, after the curved portion 31 is bent, the flat portion 32 is located on the back side of the display panel 1, and the back panel 2 is located between the flat portion 32 and the display panel 1. A first alignment mark 1a is formed on the back side of the display panel 1, and a first through hole 2a is formed on the back panel 2. The first through hole 2a is used to expose the first alignment mark 1a, and a second through hole 32a is formed on the flat portion 32. The center positions of the first alignment mark 1a, the first through hole 2a, and the second through hole 32a are relatively arranged along the thickness direction. For example, the center positions of the three are located on the same axis, so that the first alignment mark 1a can be exposed at the second through hole 32a.

[0098] For example, in the examples of Figures 9 to 11, the first alignment mark 1a is located between the two end edges of the flat portion 32 in the left-right direction. Before the bending portion 31 is bent (as shown in Figure 9), the display panel 1, the bending portion 31 and the flat portion 32 are arranged in sequence along the front-to-back direction. The display panel 1 is connected to the bending portion 31. The display panel 1 is formed with two first alignment marks 1a spaced apart along the left-right direction, and the two first alignment marks 1a are arranged adjacent to the bending portion 31. The back panel 2 is provided on the back side of the display panel 1. The back panel 2 is formed with two first through holes 2a. The two first through holes 2a are spaced apart along the left-right direction. The flat portion 32 is formed with two second through holes 32a and two second alignment marks 32b. The second through holes 32a and the corresponding first through holes 2a are symmetrically arranged along the bending center line of the bending portion 31. The two second alignment marks 32b are spaced apart in the left and right directions. The two second alignment marks 32b are respectively arranged adjacent to the adjacent second through holes 32a, so that each second alignment mark 32b is spaced apart from the corresponding first alignment mark 1a.

[0099] After the bent portion 31 is bent, the flat portion 32 is located on the backside of the display panel 1 and backplane 2. The second through hole 32a is aligned with the first alignment mark 1a and the first through hole 2a along the thickness direction, allowing the first alignment mark 1a to be visible through the second through hole 32a. A CCD (Charge Coupled Device) camera recognizes the first alignment mark 1a through the second through hole 32a and performs alignment detection with the second alignment mark 32b. Thus, the alignment accuracy of the flat portion 32 and the display panel 1 can be monitored by the two pairs of first alignment marks 1a and second alignment marks 32b spaced apart in the left-right direction, ensuring accurate alignment of the flat portion 32 and the display panel 1 after the bending.

[0100] It can be understood that before the bending portion 31 is bent (as shown in Figure 9), the center of the second through hole 32a and the center of the first alignment mark 1a are symmetrically arranged relative to the bending center line (Bending line) of the bending portion 31, and after the bending portion 31 is bent (as shown in Figure 11), the center of the second through hole 32a and the center of the first alignment mark 1a are mirror-symmetrical relative to the plane parallel to the display panel 1 where the bending center line of the bending portion 31 is located.

[0101] Alternatively, the second through hole 32a can be processed without adding additional steps, saving production time and cost. For example, in the hole-cutting section (e.g., the camera area hole-cutting section), the second through hole 32a can be processed after the corresponding hole-cutting work is completed. That is, the second through hole 32a can be processed in the hole-cutting section, which has high process feasibility.

[0102] Optionally, the bent portion 31 and the flat portion 32 are integral with the display panel 1 or are separate components. For example, the bent portion 31 and the flat portion 32 are integral with the display panel 1, and the bent portion 31 and the flat portion 32 are part of the panel (e.g., obtained by performing special-shaped cutting of the panel using pad bending technology); or the bent portion 31 and the flat portion 32 are separate components from the display panel 1, with the bent portion 31 bound to the display panel 1 and connected to the flat portion 32. The binding structure 3 corresponding to the bent portion 31 and the flat portion 32 may include a chip on film (COF) or a flexible printed circuit (FPC), etc.

[0103] It is understandable that, compared to some technologies, when the first alignment mark is set at the corner of the display panel, the backplane needs to be designed with an opening (e.g., a first through-hole) at the position corresponding to the first alignment mark to avoid the design and expose the first alignment mark. The corner of the display panel is not covered by the backplane, making the corner of the display panel vulnerable to damage by external forces (e.g., collision, etc.). In the embodiment of the present application, the first alignment mark 1a is located between the two opposite edges of the flat portion 32, and the distance between the two opposite edges of the flat portion 32 is less than the corresponding size of the display panel 1 (i.e., the width of the display panel 1 in the first direction). Then, the first alignment mark 1a can be located at a position away from the corner of the display panel 1 (as shown in Figure 8). As a result, the backplane 2 has a corresponding first through-hole 2a located at a position away from the corner of the backplane 2, so that the corner of the display panel 1 is covered by a portion of the backplane 2, thereby improving the safety of the corner of the display panel 1, effectively reducing the risk of damage to the corner of the display panel 1 by external forces, and improving the reliability of the display module 100.

[0104] Of course, in other embodiments of the present application, the display module 100 also includes a binding structure 3, which includes a bending portion 31 and a flat portion 32. The bending portion 31 is bent, and the flat portion 32 is provided on the back side of the display panel 1. The two ends of the bending portion 31 are respectively connected to the display panel 1 and the flat portion 32. The first alignment mark 1a is located outside the opposite end edges of the flat portion 32. After the bending portion 31 is bent, the flat portion 32 will not cover the first alignment mark 1a; a second alignment mark 32b is formed on the flat portion 32, and the flat portion 32 does not have a second through hole 32a. The second alignment mark 32b is provided corresponding to the first alignment mark 1a. The second alignment mark 32b is used to cooperate with the first alignment mark 1a to align the flat portion 32, thereby realizing the bending alignment of the bending portion 31.

[0105] For example, in the example of Figure 1, the first alignment mark 1a is located outside the two end edges of the flat portion 32 in the left and right directions, and the flat portion 32 is not formed with a second through hole 32a; before the bending portion 31 is bent (as shown in Figure 1), the display panel 1, the bending portion 31 and the flat portion 32 are arranged in sequence along the front-to-back direction, the display panel 1 is connected to the bending portion 31, and the display panel 1 is formed with two first alignment marks 1a spaced apart along the left and right directions, and the two first alignment marks 1a are arranged adjacent to the bending portion 31 in the front-to-back direction, the back panel 2 is provided on the back side of the display panel 1, and the back panel 2 is formed with two first through holes 2a, and the two first through holes 2a are spaced apart along the left and right directions, and each first through hole 2a is opposite to a corresponding first alignment mark 1a, so that the first through hole 2a exposes the first alignment mark 1a, and the flat portion 32 is formed with two second alignment marks 32b, and the two second alignment marks 32b are spaced apart along the left and right directions.

[0106] After the bent portion 31 is bent (as shown in FIG5 ), the flat portion 32 is located on the back side of the display panel 1 and the back plate 2. The second alignment mark 32b on the left side is aligned with the first alignment mark 1a on the left side, and the second alignment mark 32b on the right side is aligned with the first alignment mark 1a on the right side. The CCD camera identifies and detects the corresponding first alignment mark 1a and second alignment mark 32b. Thus, the alignment accuracy of the flat portion 32 and the display panel 1 can be monitored by the two pairs of first alignment marks 1a and second alignment marks 32b spaced apart in the left-right direction, ensuring accurate alignment of the flat portion 32 and the display panel 1 after the bending.

[0107] In some embodiments, as shown in FIG. 12 , the binding structure 3 further includes a binding portion 33 , and the binding portion 33 is bound and connected to the flat portion 32 .

[0108] Optionally, when the bending portion 31 and the flat portion 32 are integrated with the display panel 1 , the binding portion 33 includes a chip-on-film (COF), or the binding portion 33 includes a flexible circuit board and a printed circuit board (PCB).

[0109] For example, in conjunction with Figure 9, when the bending portion 31 and the flat portion 32 are an integral part with the display panel 1, the binding portion 33 includes a flexible circuit board and a printed circuit board, the flexible circuit board is bound and connected to the flat portion 32, and the printed circuit board is connected to the flexible circuit board; or, when the bending portion 31 and the flat portion 32 are separate parts with the display panel 1, the bending portion 31 and the flat portion 32 are flexible circuit boards, the binding portion 33 is a chip-on-chip film, and the flexible circuit board is connected to the chip-on-chip film.

[0110] In some embodiments, in combination with Figures 9 and 12, the flat portion 32 has a binding area 321 and a non-binding area 322. The binding area 32 is used to bind with other components. The second through hole 32a is formed on the non-binding area 322, which is convenient for setting the second through hole 32a and preventing the second through hole 32a from affecting the binding connection of the binding area 321. The position of the second through hole 32a on the flat portion 32 can be reasonably designed to adapt to the structure and requirements of the display module 100, thereby improving the applicability of the display module 100.

[0111] For example, the flat portion 32 has a binding area 321 and a non-binding area 322, the non-binding area 322 connects the bending portion 31 and the binding area 321 respectively, the second through hole 32a is formed in the non-binding area 322, and the binding structure 3 also includes a binding portion 33, which is bound and connected to the binding area 321.

[0112] Optionally, there may be one, two, or more binding areas 321 ; when there are multiple binding areas 321 , the second through hole 32 a may be formed on a portion of the non-binding area 322 located between two adjacent binding areas 321 .

[0113] It is understood that the second through hole 32a is formed in the non-binding area 322. The location of the second through hole 32a in the non-binding area 322 is a non-circuit portion of the flat portion 32, or a portion of the flat portion 32 with a low circuit density. In other words, the second through hole 32a does not affect the circuit routing of the flat portion 32. Of course, the non-binding area 322 has fewer circuits or no circuits compared to the binding area 321, which facilitates the provision of the second through hole 32a in the flat portion 32.

[0114] In other embodiments, the binding region 321 is bound to the binding portion 33 , the second through hole 32 a may be formed in the binding region 321 , and the second through hole 32 a is formed in non-circuit portions of the binding region 321 and the binding portion 33 .

[0115] In some embodiments, as shown in Figure 12, there are multiple binding areas 321 and the multiple binding areas 321 are spaced apart along the first direction. The second through hole 32a is staggered with the binding area 321 in the first direction. The second through hole 32a is provided on the portion of the non-binding area 322 located between two adjacent binding areas 321 in the first direction. Then, the projection of the second through hole 32a along the second direction is located between the projections of the two adjacent binding areas 321 along the second direction, so as to further avoid the setting of the second through hole 32a affecting the binding area 321, ensure the reliability of the binding area 321 binding related components (such as the binding part 33), and reduce the influence of the second through hole 32a on the routing of the binding area 321.

[0116] Of course, in other embodiments, when multiple binding areas 321 are spaced apart along the first direction, and the second through hole 32a is disposed on a portion of the non-binding area 321 that is opposite the binding area 321 along the second direction, the projection of the second through hole 32a along the second direction is opposite the projection of the corresponding binding area 321 along the second direction. In other words, when the non-binding area 322 connects the binding area 321 and the bending portion 31, the second through hole 32a is formed in the non-binding area 322. The second through hole 32a can be located in a portion of the non-binding area 322 that is offset from the binding area 321, or the second through hole 32a can be located in a portion of the non-binding area 322 that is opposite the binding area 321. Thus, the second through hole 32a can be flexibly disposed on the non-binding area 322.

[0117] It can be understood that the portion of the non-binding area 322 that is offset from the binding area 321 (for example, the non-binding area 322 between two adjacent binding areas 321) can be a non-circuit portion or can be relatively easily designed as a non-circuit portion to facilitate the setting of the second through hole 32a; the non-circuit portion can be understood as the corresponding portion having no display and touch-related wiring, etc.

[0118] For example, in the example of Figure 12, the flat portion 32 has three binding areas 321, each binding area 321 is bound and connected to a binding portion 33 (such as a chip-on-film, etc.), and the flat portion 32 is formed with two second through holes 32a spaced apart along the left and right directions. In the left and right directions, each second through hole 32a is arranged between two adjacent binding areas 321.

[0119] In some embodiments, in combination with Figure 11, on a preset plane, the orthographic projection of the peripheral wall of the second through hole 32a is located between the orthographic projection outer contour of the first alignment mark 1a and the orthographic projection of the peripheral wall of the first through hole 2a, and the preset plane is perpendicular to the thickness direction of the display panel 1 to ensure that the opening areas of the second through hole 32a and the first through hole 2a are appropriate, so that the complete first alignment mark 1a can be observed through the second through hole 32a and the first through hole 2a, ensuring the accuracy of the alignment detection of the second alignment mark 32b and the first alignment mark 1a. At the same time, when there is a certain error after the bending portion 31 is bent, the larger first through hole 2a can adapt to the error to ensure that the complete first alignment mark 1a can be observed through the second through hole 32a and the first through hole 2a.

[0120] Therefore, in conjunction with Figure 11, the first through hole 2a and the second through hole 32a are both circular holes. On a predetermined plane, the diameter corresponding to the orthographic projection outer contour of the first alignment mark 1a is d1, the diameter corresponding to the orthographic projection of the peripheral wall of the first through hole 2a is d2, and the diameter corresponding to the orthographic projection of the peripheral wall of the second through hole 32a is d3. For illustration, the orthographic projection of the peripheral wall of the second through hole 32a is located between the orthographic projection outer contour of the first alignment mark 1a and the orthographic projection of the peripheral wall of the first through hole 2a, satisfying d1 < d3 < d2. Of course, the opening shapes of the first through hole 2a and the second through hole 32a are not limited to this.

[0121] Optionally, the second through hole 32a is a circular hole, and the diameter corresponding to the orthographic projection of the peripheral wall of the second through hole 32a is d3, d3 ≥ 300 μm, to ensure that the second through hole 32a has a suitable opening area for observing the first alignment mark 1a. Of course, the shape of the second through hole 32a is not limited to this.

[0122] In some embodiments, as shown in Figure 7, the display module 100 also includes a polarizer 4, an optical glue 5 and a transparent cover plate 6. The polarizer 4 is arranged on the side of the display panel 1 facing away from the back plate 2, the optical glue 5 is arranged on the side of the polarizer 4 facing away from the display panel 1, and the transparent cover plate 6 is arranged on the side of the optical glue 5 facing away from the polarizer 4, and the outer contour of the transparent cover plate 6 is located outside the outer contour of the optical glue 5.

[0123] For example, in the example of Figure 7, the display module 100 includes a transparent cover 6 (CG), an optical adhesive 5 (OCA), a polarizer 4 (Pol), a display panel 1 (PNL) and a back panel 2 (BKT), and the transparent cover 6, the optical adhesive 5, the polarizer 4, the display panel 1 and the back panel 2 are arranged in sequence from bottom to top; the "upper" and "lower" shown in Figure 7 do not mean a limitation on the placement posture of the display module 100 in actual use, but are only for simplifying the description.

[0124] Optionally, the transparent cover plate 6 may be made of materials such as polycarbonate (PC) or polyethylene terephthalate (PET).

[0125] In some technologies, in order to prevent overflow of optical glue or polarizer, part of the edge of the display panel is usually made to extend beyond the edge of the optical glue and polarizer, that is, on the preset plane, the orthographic projection of the optical glue and polarizer is located within the outer contour of the orthographic projection of the display panel, so that the edge of the display panel is in a suspended state; in addition, when the back panel is designed to completely cover the display panel, it will block the two alignment marks, so the back panel needs to be opened at the corresponding position to avoid them, so that part of the display panel has neither optical glue or polarizer attached nor the protection of the back panel, so that during the assembly or transportation of the display module, the above-mentioned part of the display panel (the corners of the display panel) is very likely to be deformed due to the impact of external force, resulting in GDS and other adverse problems in the subsequent use or reliability of the display module. In an embodiment of the present application, a corresponding first protection portion 21 and / or second protection portion 22 is designed on the basis of the back panel 2 to protect the corners of the display panel 1, so as to meet the need to prevent the corresponding corners of the display panel 1 from being bumped during assembly, transportation, etc., and to avoid damage to the display module 100 during assembly or transportation, which is beneficial to improving the yield and stability of the display module 100.

[0126] However, during product development, the inventors discovered that in the display module 100, since the first through hole 2a exposes the display panel 1, the display module 100's resistance to frontal pressure is weakened at the first through hole 2a, making it prone to dark spot defects (GDS). This is detrimental to product development.

[0127] To address the aforementioned issues, the present application further discloses a display module comprising: a display panel having a first alignment mark disposed on its back side; a backplate located on the back side of the display panel and having a closed through-hole formed thereon, opposite to the first alignment mark; and an adhesive layer located between the backplate and the display panel, adhering the backplate to the display panel, wherein a filler is disposed within the closed through-hole. The presence of the filler within the closed through-hole enhances the display module's resistance to frontal extrusion at the closed through-hole, eliminating dark spot defects.

[0128] Figure 13 is a partial schematic diagram of a display module according to some embodiments of the present disclosure; Figure 14 is a cross-sectional view along line BB shown in Figure 13. As shown in Figures 13 and 14, the display module 100 includes a display panel 1 and a back plate 2. The back plate 2 is provided on the back side of the display panel 1, and the back plate 2 has a certain function of enhancing the structural strength of the display module 100. An adhesive layer 201 is provided between the back plate 2 and the display panel 1, and the adhesive layer 201 adheres the back plate 2 to the display panel 1. A first alignment mark 1a is provided on the back side of the display panel 1, and a closed through hole 2h is formed on the back plate 2 opposite to the first alignment mark 1a. The closed through hole 2h can penetrate the back plate 2 along the thickness direction of the back plate 2.

[0129] As shown in Figure 14, the display module 100 also includes a polarizer 4, an optical glue 5 and a transparent cover plate 6. The polarizer 4 is arranged on the side of the display panel 1 away from the back plate 2, the optical glue 5 is arranged on the side of the polarizer 4 away from the display panel 1, and the transparent cover plate 6 is arranged on the side of the optical glue 5 away from the polarizer 4, and the outer contour of the transparent cover plate 6 protrudes outward relative to the outer contour of the optical glue 5.

[0130] As shown in Figures 13 and 14, a filler 2f is provided in the closed through hole 2h. Due to the filler 2f provided in the closed through hole 2h, the display module 100 is more resistant to frontal extrusion at the closed through hole 2h, eliminating dark spot defects.

[0131] In some embodiments, the light transmittance of the filler 2f is greater than 90%. A first alignment mark 1a is provided on the back side of the display panel 1, and a closed through hole 2h is formed on the back plate 2 opposite to the first alignment mark 1a. The closed through hole 2h passes through the back plate 2 along the thickness direction of the back plate 2. In order to enhance the display module 100's ability to resist frontal extrusion, a filler 2f is provided in the enhanced closed through hole 2h. By setting the light transmittance of the filler 2f to be greater than 90%, the filler 2f can expose the first alignment mark 1a to facilitate alignment identification in subsequent processes. In this way, it is possible to take into account both enhancing the display module 100's ability to resist frontal extrusion and exposing the alignment mark 1a during the alignment identification process.

[0132] In some embodiments, the filler 2f is formed by an injection molding process, that is, the filler 2f is an injection molded part. The material of the filler 2f includes polycarbonate (PC), polymethyl methacrylate (PMMA), or sapphire.

[0133] In some embodiments, the filler 2f is a conductive adhesive. Although conductive adhesive is less effective than the aforementioned injection molded parts in enhancing the display module 100's resistance to frontal extrusion, by using conductive adhesive, the filler 2f and the portion of the backplate 2 other than the closed through-hole 2h form a conductive whole, preventing static electricity and the risk of a green screen on the display panel 1.

[0134] Furthermore, if the filler 2f is an injection molded part, the injection molded part can be pre-formed in the closed through-hole 2h of the backplane 2, and then the backplane 2 with the injection molded part can be adhered to the display panel 1. If the filler 2f is a conductive adhesive, the backplane 2 without the conductive adhesive can be adhered to the display panel 1 first, and then the conductive adhesive can be injected into the closed through-hole 2h of the backplane 2.

[0135] Figure 15 is a partial schematic diagram of a display module according to some embodiments of the present disclosure; Figure 16 is a cross-sectional view along the CC line shown in Figure 15. As shown in Figures 15 and 16, the display module 100 includes a display panel 1 and a back plate 2. The back plate 2 is provided on the back side of the display panel 1, and the back plate 2 has a certain function of enhancing the structural strength of the display module 100. An adhesive layer 201 is provided between the back plate 2 and the display panel 1, and the adhesive layer 201 adheres the back plate 2 to the display panel 1. A first alignment mark 1a is provided on the back side of the display panel 1, and a closed through hole 2h is formed on the back plate 2 opposite to the first alignment mark 1a. The closed through hole 2h can penetrate the back plate 2 along the thickness direction of the back plate 2.

[0136] As shown in Figure 16, the display module 100 also includes a polarizer 4, an optical glue 5 and a transparent cover plate 6. The polarizer 4 is arranged on the side of the display panel 1 away from the back plate 2, the optical glue 5 is arranged on the side of the polarizer 4 away from the display panel 1, and the transparent cover plate 6 is arranged on the side of the optical glue 5 away from the polarizer 4, and the outer contour of the transparent cover plate 6 protrudes outward relative to the outer contour of the optical glue 5.

[0137] As shown in Figures 15 and 16, a filler 2f is provided in the closed through hole 2h. Due to the filler 2f provided in the closed through hole 2h, the display module 100 is more resistant to frontal extrusion at the closed through hole 2h, eliminating dark spot defects.

[0138] In some embodiments, the light transmittance of the filler 2f is greater than 90%. A first alignment mark 1a is provided on the back side of the display panel 1, and a closed through hole 2h is formed on the back plate 2 opposite to the first alignment mark 1a. The closed through hole 2h passes through the back plate 2 along the thickness direction of the back plate 2. In order to enhance the display module 100's ability to resist frontal extrusion, a filler 2f is provided in the enhanced closed through hole 2h. By setting the light transmittance of the filler 2f to be greater than 90%, the filler 2f can expose the first alignment mark 1a to facilitate alignment identification in subsequent processes. In this way, it is possible to take into account both enhancing the display module 100's ability to resist frontal extrusion and exposing the alignment mark 1a during the alignment identification process.

[0139] In some embodiments, the filler 2f is formed by an injection molding process, and the material of the filler 2f includes polycarbonate (PC), polymethyl methacrylate (PMMA), or sapphire.

[0140] In some embodiments, the filler 2f is a conductive adhesive. Although conductive adhesive is less effective than the aforementioned injection molded parts in enhancing the display module 100's resistance to frontal extrusion, by using conductive adhesive, the filler 2f and the portion of the backplate 2 other than the closed through-hole 2h form a conductive whole, preventing static electricity and the risk of a green screen on the display panel 1.

[0141] As shown in Figures 15 and 16 , in the display module 100 , the display panel 1 has a bendable area BA, and the back panel 2 has a pattern area PA opposite to the bendable area BA. For example, the display module 100 is a foldable display module.

[0142] As shown in Figure 15, the pattern area PA is provided with a plurality of slits 2s parallel to each other. Each slit 2s has a first end 2sa and a second end 2sb opposite to each other along its extension direction. The first end 2sa is a closed end; the second end 2sb is an open end and passes through the side of the back plate 2. The width of the first end 2sa is greater than the width of the second end 2sb. It should be noted that what is shown in Figure 15 is only an example, and the present disclosure does not impose too many restrictions on the specific shape of the slit 2s. For example, at least one slit 2s may have a first end 2sa and a second end 2sb opposite to each other along its extension direction as shown in Figure 15, and the remaining slits 2s may have other shapes.

[0143] As shown in FIG15 , the first ends 2sa and second ends 2sb of the plurality of slits 2s are arranged alternately on either side along the extending direction of the slits 2s. For example, on the upper side in FIG15 , the first ends 2sa and second ends 2sb of the plurality of slits 2s are arranged alternately. For example, on the lower side in FIG15 , the first ends 2sa and second ends 2sb of the plurality of slits 2s are arranged alternately.

[0144] As shown in Figures 15 and 16, each of the multiple slits 2s is filled with a glue strip AS. By providing the glue strip AS, the pattern area PA of the back plate 2 can be protected from deformation during the process of attaching the back plate 2 to the display panel 1. It should be noted that the present disclosure does not require that all slits 2s are filled with glue strips AS. In some embodiments, at least one of the multiple slits 2s is filled with a glue strip AS. For example, in the examples shown in Figures 15 and 16, one, two, or three of the four slits 2s may be filled with glue strips AS, while the remaining slits 2s may not be provided with glue strips AS.

[0145] Specifically, before attaching the backplane 2 to the display panel 1, the backplane 2 and the adhesive layer 201 are the two film layers in the backplane assembly. In the backplane assembly, a protective film is also provided on the side of the adhesive layer 201 away from the backplane 2. When attaching the backplane 2 to the display panel 1, the protective film must first be removed, and then the backplane 2 with the adhesive layer 201 must be attached to the display panel 1.

[0146] In the back plate 2 according to the related art, no adhesive strips AS are provided in the plurality of slits 2s. Since the back plate 2 and the adhesive layer 201 are thick in the related art, the back plate 2 and the adhesive layer 201 will not be deformed during the process of removing the protective film.

[0147] As the display module 100 becomes thinner, the backplane 2 and adhesive layer 201 become more susceptible to deformation during the removal of the protective film. For example, in a display module 100 according to the related art, the thicknesses of the backplane 2 and adhesive layer 201 are 0.15 mm and 0.065 mm, respectively; whereas, in the display module 100 according to the present disclosure, the thicknesses of the backplane 2 and adhesive layer 201 are 0.12 mm and 0.02 mm, respectively. In the display module 100 according to the present disclosure, if the adhesive strip AS is not provided, the backplane 2 and adhesive layer 201 are susceptible to deformation during the removal of the protective film, particularly in the patterned area PA of the backplane 2.

[0148] In the display module 100 according to the present disclosure, due to the provision of the adhesive strip AS, the back panel 2 and the adhesive layer 201 will not be deformed during the process of tearing off the protective film, thereby protecting the pattern area PA of the back panel 2 from deformation during the process of attaching the back panel 2 to the display panel 1.

[0149] In some embodiments, the light transmittance of the adhesive strip AS is less than 10%. For example, the adhesive strip is black. In this way, the adhesive strip AS can improve the display abnormality in the pattern area PA.

[0150] Figure 17 is another cross-sectional view taken along line CC shown in Figure 15 . As shown in Figures 15 and 17 , the display module 100 includes a display panel 1 and a backplane 2. The backplane 2 is disposed on the back side of the display panel 1 and serves to enhance the structural strength of the display module 100. An adhesive layer 201 is disposed between the backplane 2 and the display panel 1, adhering the backplane 2 to the display panel 1. A first alignment mark 1a is provided on the back side of the display panel 1. A closed through-hole 2h is formed in the backplane 2, opposite to the first alignment mark 1a. The closed through-hole 2h extends through the thickness of the backplane 2.

[0151] As shown in Figure 17, the display module 100 also includes a polarizer 4, an optical glue 5 and a transparent cover plate 6. The polarizer 4 is arranged on the side of the display panel 1 away from the back plate 2, the optical glue 5 is arranged on the side of the polarizer 4 away from the display panel 1, and the transparent cover plate 6 is arranged on the side of the optical glue 5 away from the polarizer 4, and the outer contour of the transparent cover plate 6 protrudes outward relative to the outer contour of the optical glue 5.

[0152] As shown in Figures 15 and 17, a filler 2f is provided in the closed through hole 2h. Due to the filler 2f provided in the closed through hole 2h, the display module 100 is more resistant to frontal extrusion at the closed through hole 2h, eliminating dark spot defects.

[0153] As shown in Figures 15 and 17 , in the display module 100 , the display panel 1 has a bendable area BA, and the back panel 2 has a pattern area PA opposite to the bendable area BA. For example, the display module 100 is a foldable display module.

[0154] As shown in Figure 15, the pattern area PA is provided with a plurality of slits 2s parallel to each other. Each slit 2s has a first end 2sa and a second end 2sb opposite to each other along its extension direction. The first end 2sa is a closed end; the second end 2sb is an open end and passes through the side of the back plate 2. The width of the first end 2sa is greater than the width of the second end 2sb. It should be noted that what is shown in Figure 15 is only an example, and the present disclosure does not impose too many restrictions on the specific shape of the slit 2s. For example, at least one slit 2s may have a first end 2sa and a second end 2sb opposite to each other along its extension direction as shown in Figure 15, and the remaining slits 2s may have other shapes.

[0155] As shown in FIG15 , the first ends 2sa and second ends 2sb of the plurality of slits 2s are arranged alternately on either side along the extending direction of the slits 2s. For example, on the upper side in FIG15 , the first ends 2sa and second ends 2sb of the plurality of slits 2s are arranged alternately. For example, on the lower side in FIG15 , the first ends 2sa and second ends 2sb of the plurality of slits 2s are arranged alternately.

[0156] As shown in Figures 15 and 17, each of the multiple slits 2s is filled with a glue strip AS. By providing the glue strip AS, the pattern area PA of the back plate 2 can be protected from deformation during the process of attaching the back plate 2 to the display panel 1. It should be noted that the present disclosure does not require that all slits 2s are filled with glue strips AS. In some embodiments, at least one of the multiple slits 2s is filled with a glue strip AS. For example, in the examples shown in Figures 15 and 17, one, two, or three of the four slits 2s may be filled with glue strips AS, while the remaining slits 2s may not be provided with glue strips AS.

[0157] Unlike FIG16 , as shown in FIG17 , in a cross section perpendicular to the backplane 2 and perpendicular to the extension direction of the slit 2s, the width of the adhesive strip AS gradually increases as it moves away from the adhesive layer 201. This arrangement prevents the adhesive strip AS from being pulled out of the backplane 2 during the removal of the protective film, thereby better protecting the pattern area PA of the backplane 2 from deformation.

[0158] Figure 18 is a schematic diagram of a backplane assembly according to some embodiments of the present disclosure; Figure 19 is a cross-sectional view along the DD line shown in Figure 18. As shown in Figures 18 and 19, the backplane assembly 20 according to some embodiments of the present disclosure includes a backplane 2, an adhesive layer 201, and a protective film 202. The backplane 2 has a closed through hole 2h, which can pass through the backplane 2 along the thickness direction of the backplane 2. The position of the closed through hole 2h corresponds to the position of the first alignment mark on the back side of the display panel to be adhered. The adhesive layer 201 is located on one side of the backplane 2 and is configured to adhere the backplane 2 to the display panel. The protective film 202 is located on the side of the adhesive layer 201 away from the backplane 2.

[0159] As shown in Figures 18 and 19, a filler 2f is provided in the closed through hole 2h. This placement of the filler 2f enhances the display module's resistance to frontal extrusion at the closed through hole 2h after the back plate 2 is adhered to the display panel, eliminating dark spot defects.

[0160] In some embodiments, the light transmittance of the filler 2f is greater than 90%. In conjunction with Figures 13 and 14, a first alignment mark 1a is provided on the back side of the display panel 1, and a closed through hole 2h is formed on the back plate 2 opposite to the first alignment mark 1a, and the closed through hole 2h passes through the back plate 2 along the thickness direction of the back plate 2. In order to enhance the display module 100's ability to resist frontal extrusion, a filler 2f is provided in the enhanced closed through hole 2h. By setting the light transmittance of the filler 2f to be greater than 90%, the filler 2f can expose the first alignment mark 1a to facilitate alignment identification in subsequent processes. In this way, it is possible to take into account both enhancing the display module 100's ability to resist frontal extrusion and exposing the alignment mark 1a during the alignment identification process.

[0161] In some embodiments, the filler 2f is formed by an injection molding process, and the material of the filler 2f includes polycarbonate (PC), polymethyl methacrylate (PMMA), or sapphire.

[0162] Figure 20 is a schematic diagram of a backplane assembly according to some embodiments of the present disclosure; Figure 21 is a cross-sectional view along line EE shown in Figure 20. As shown in Figures 20 and 21, the backplane assembly 20 according to some embodiments of the present disclosure includes a backplane 2, an adhesive layer 201, and a protective film 202. The backplane 2 has a closed through hole 2h, which can pass through the backplane 2 along the thickness direction of the backplane 2. The position of the closed through hole 2h corresponds to the position of the first alignment mark on the back side of the display panel to be adhered. The adhesive layer 201 is located on one side of the backplane 2 and is configured to adhere the backplane 2 to the display panel. The protective film 202 is located on the side of the adhesive layer 201 away from the backplane 2.

[0163] As shown in Figures 20 and 21, a filler 2f is provided in the closed through hole 2h. This placement of the filler 2f enhances the display module's resistance to frontal extrusion at the closed through hole 2h after the back plate 2 is adhered to the display panel, eliminating dark spot defects.

[0164] In some embodiments, the light transmittance of the filler 2f is greater than 90%. In conjunction with Figures 15 and 16, a first alignment mark 1a is provided on the back side of the display panel 1, and a closed through hole 2h is formed on the back plate 2 opposite to the first alignment mark 1a, and the closed through hole 2h passes through the back plate 2 along the thickness direction of the back plate 2. In order to enhance the display module 100's ability to resist frontal extrusion, a filler 2f is provided in the enhanced closed through hole 2h. By setting the light transmittance of the filler 2f to be greater than 90%, the filler 2f can expose the first alignment mark 1a to facilitate alignment identification in subsequent processes. In this way, it is possible to take into account both enhancing the display module 100's ability to resist frontal extrusion and exposing the alignment mark 1a during the alignment identification process.

[0165] In some embodiments, the filler 2f is formed by an injection molding process, and the material of the filler 2f includes polycarbonate (PC), polymethyl methacrylate (PMMA), or sapphire.

[0166] As shown in Figures 15 and 16 , after the backplane assembly 20 is adhered to the display panel 1, the display panel 1 has a bendable area BA, and the backplane 2 has a patterned area PA opposite the bendable area BA. For example, the display module 100 is a foldable display module.

[0167] As shown in Figure 20, the pattern area PA is provided with a plurality of slits 2s parallel to each other. Each slit 2s has a first end 2sa and a second end 2sb opposite to each other along its extension direction. The first end 2sa is a closed end; the second end 2sb is an open end and passes through the side of the back plate 2. The width of the first end 2sa is greater than the width of the second end 2sb. It should be noted that what is shown in Figure 20 is only an example, and the present disclosure does not impose too many restrictions on the specific shape of the slit 2s. For example, at least one slit 2s may have a first end 2sa and a second end 2sb opposite to each other along its extension direction as shown in Figure 20, and the remaining slits 2s may have other shapes.

[0168] As shown in FIG20 , the first ends 2sa and second ends 2sb of the plurality of slits 2s are arranged alternately on either side along the extending direction of the slits 2s. For example, on the upper side in FIG20 , the first ends 2sa and second ends 2sb of the plurality of slits 2s are arranged alternately. For example, on the lower side in FIG20 , the first ends 2sa and second ends 2sb of the plurality of slits 2s are arranged alternately.

[0169] As shown in Figures 20 and 21, each of the multiple slits 2s is filled with a glue strip AS. By providing the glue strip AS, the pattern area PA of the back plate 2 can be protected from deformation during the process of attaching the back plate 2 to the display panel 1. It should be noted that the present disclosure does not require that all slits 2s are filled with glue strips AS. In some embodiments, at least one of the multiple slits 2s is filled with a glue strip AS. For example, in the examples shown in Figures 20 and 21, one, two, or three of the four slits 2s may be filled with glue strips AS, while the remaining slits 2s may not be provided with glue strips AS.

[0170] Specifically, before the backplane 2 is attached to the display panel 1, the backplane assembly 20 includes the backplane 2, the adhesive layer 201, and the protective film 202. When attaching the backplane 2 to the display panel 1, the protective film 202 needs to be removed first, and then the backplane 2 with the adhesive layer 201 is attached to the display panel 1.

[0171] In the back plate 2 according to the related art, no adhesive strips AS are provided in the plurality of slits 2s. Since the back plate 2 and the adhesive layer 201 are thick in the related art, the back plate 2 and the adhesive layer 201 will not be deformed during the process of removing the protective film 202.

[0172] As the display module 100 becomes thinner, the backplane 2 and adhesive layer 201 become more susceptible to deformation during the removal of the protective film 202. For example, in the display module 100 according to the related art, the thicknesses of the backplane 2 and adhesive layer 201 are 0.15 mm and 0.065 mm, respectively; whereas, in the display module 100 according to the present disclosure, the thicknesses of the backplane 2 and adhesive layer 201 are 0.12 mm and 0.02 mm, respectively. In the display module 100 according to the present disclosure, if the adhesive strip AS is not provided, the backplane 2 and adhesive layer 201 are susceptible to deformation during the removal of the protective film 202, particularly in the pattern area PA of the backplane 2.

[0173] In the back panel assembly 20 according to the present disclosure, due to the provision of the adhesive strip AS, the back panel 2 and the adhesive layer 201 will not be deformed during the process of tearing off the protective film 202, thereby being able to protect the pattern area PA of the back panel 2 from deformation during the process of attaching the back panel 2 to the display panel 1.

[0174] In some embodiments, the light transmittance of the adhesive strip AS is less than 10%. For example, the adhesive strip is black. In this way, the adhesive strip AS can improve the display abnormality in the pattern area PA.

[0175] FIG22 is another cross-sectional view along line EE shown in FIG20 . As shown in FIG20 and FIG22 , the backplane assembly 20 according to some embodiments of the present disclosure includes a backplane 2, an adhesive layer 201, and a protective film 202. The backplane 2 has a closed through-hole 2h, which can penetrate the backplane 2 along the thickness direction of the backplane 2. The position of the closed through-hole 2h corresponds to the position of the first alignment mark on the back side of the display panel to be adhered. The adhesive layer 201 is located on one side of the backplane 2 and is configured to adhere the backplane 2 to the display panel. The protective film 202 is located on the side of the adhesive layer 201 away from the backplane 2.

[0176] As shown in Figures 20 and 22, a filler 2f is provided in the closed through hole 2h. This placement of the filler 2f enhances the display module's resistance to frontal extrusion at the closed through hole 2h after the back plate 2 is adhered to the display panel, eliminating dark spot defects.

[0177] In some embodiments, the light transmittance of the filler 2f is greater than 90%. In conjunction with Figures 15 and 17, a first alignment mark 1a is provided on the back side of the display panel 1, and a closed through hole 2h is formed on the back plate 2 opposite to the first alignment mark 1a, and the closed through hole 2h passes through the back plate 2 along the thickness direction of the back plate 2. In order to enhance the display module 100's ability to resist frontal extrusion, a filler 2f is provided in the enhanced closed through hole 2h. By setting the light transmittance of the filler 2f to be greater than 90%, the filler 2f can expose the first alignment mark 1a to facilitate alignment identification in subsequent processes. In this way, it is possible to take into account both enhancing the display module 100's ability to resist frontal extrusion and exposing the alignment mark 1a during the alignment identification process.

[0178] In some embodiments, the filler 2f is formed by an injection molding process, and the material of the filler 2f includes polycarbonate (PC), polymethyl methacrylate (PMMA), or sapphire.

[0179] As shown in Figures 15 and 17 , after the backplane assembly 20 is adhered to the display panel 1, the display panel 1 has a bendable area BA, and the backplane 2 has a patterned area PA opposite the bendable area BA. For example, the display module 100 is a foldable display module.

[0180] As shown in Figure 20, the pattern area PA is provided with a plurality of slits 2s parallel to each other. Each slit 2s has a first end 2sa and a second end 2sb opposite to each other along its extension direction. The first end 2sa is a closed end; the second end 2sb is an open end and passes through the side of the back plate 2. The width of the first end 2sa is greater than the width of the second end 2sb. It should be noted that what is shown in Figure 20 is only an example, and the present disclosure does not impose too many restrictions on the specific shape of the slit 2s. For example, at least one slit 2s may have a first end 2sa and a second end 2sb opposite to each other along its extension direction as shown in Figure 20, and the remaining slits 2s may have other shapes.

[0181] As shown in FIG20 , the first ends 2sa and second ends 2sb of the plurality of slits 2s are arranged alternately on either side along the extending direction of the slits 2s. For example, on the upper side in FIG20 , the first ends 2sa and second ends 2sb of the plurality of slits 2s are arranged alternately. For example, on the lower side in FIG20 , the first ends 2sa and second ends 2sb of the plurality of slits 2s are arranged alternately.

[0182] As shown in Figures 20 and 22, each of the multiple slits 2s is filled with a glue strip AS. By providing the glue strip AS, the pattern area PA of the back plate 2 can be protected from deformation during the process of attaching the back plate 2 to the display panel 1. It should be noted that the present disclosure does not require that all slits 2s are filled with glue strips AS. In some embodiments, at least one of the multiple slits 2s is filled with a glue strip AS. For example, in the examples shown in Figures 20 and 22, one, two, or three of the four slits 2s may be filled with glue strips AS, while the remaining slits 2s may not be provided with glue strips AS.

[0183] Unlike FIG21 , as shown in FIG22 , in a cross section perpendicular to the backplane 2 and perpendicular to the extension direction of the slit 2s, the width of the adhesive strip AS gradually increases as it moves away from the adhesive layer 201. This arrangement prevents the adhesive strip AS from being pulled out of the backplane 2 during the removal of the protective film, thereby better protecting the pattern area PA of the backplane 2 from deformation.

[0184] A display device according to an embodiment of the second aspect of the present disclosure includes the display module 100 according to the embodiment of the first aspect of the present disclosure.

[0185] For example, the display device can be a display device for a vehicle, for example, a vehicle-mounted display. The display module 100 is used in the vehicle-mounted display, which can achieve a narrow-frame screen with a higher screen-to-body ratio and improve market competitiveness. Of course, the use of the display device is not limited to vehicles.

[0186] According to the display device of the embodiment of the present disclosure, by adopting the above-mentioned display module 100 , the stability and market competitiveness of the display device can be improved.

[0187] In the description of the present disclosure, it should be understood that the terms "center", "width", "thickness", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present disclosure. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, unless otherwise specified, "multiple" means two or more.

[0188] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on the specific circumstances.

[0189] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0190] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A display module, comprising: A display panel, wherein a first alignment mark is provided on the back side of the display panel; a back plate, the back plate being located at the back side of the display panel and having a closed through hole formed thereon and opposite to the first alignment mark; and an adhesive layer, which is located between the backplane and the display panel and adheres the backplane to the display panel, Wherein, a filling piece is arranged in the closed through hole.

2. The display module according to claim 1, wherein: The light transmittance of the filling piece is greater than 90%.

3. The display module according to claim 1, wherein: The filling member is formed by an injection molding process, and the material of the filling member includes polycarbonate (PC), polymethyl methacrylate (PMMA), or sapphire.

4. The display module according to claim 1, wherein: The filling piece is conductive glue.

5. The display module according to any one of claims 1 to 4, wherein: The display panel has a bendable area, the back plate has a pattern area opposite to the bendable area, the pattern area is provided with a plurality of slits parallel to each other, and at least one of the plurality of slits is filled with a glue strip.

6. The display module according to claim 5, wherein: At least one slit has a first end and a second end opposite to each other along its extension direction, wherein the first end is a closed end; and the second end is an open end and passes through to the side edge of the back plate.

7. The display module according to claim 6, wherein: The width of the first end portion is greater than the width of the second end portion.

8. The display module according to claim 6, wherein: On either side of both sides along the extending direction of the plurality of slits, the first ends and the second ends of the plurality of slits are alternately arranged.

9. The display module according to claim 5, wherein: The light transmittance of the adhesive strip is less than 10%.

10. The display module according to claim 5, wherein: In a cross section perpendicular to the back plate and perpendicular to the extending direction of the slit, the width of the adhesive strip gradually increases in a direction away from the adhesive layer.

11. A backplane assembly, comprising: a back plate having a closed through hole, wherein the position of the closed through hole corresponds to the position of the first alignment mark on the back side of the display panel to be adhered; an adhesive layer located on one side of the backplane and configured to adhere the backplane to the display panel; and a protective film, which is located on a side of the adhesive layer away from the back plate, Wherein, a filling piece is arranged in the closed through hole.

12. The back plate assembly according to claim 11, wherein: The light transmittance of the filling piece is greater than 90%.

13. The back plate assembly according to claim 11, wherein: The filling member is formed by an injection molding process, and the material of the filling member includes polycarbonate (PC), polymethyl methacrylate (PMMA), or sapphire.

14. The back plate assembly according to any one of claims 11 to 13, wherein: The display panel has a bendable area, the back plate has a pattern area opposite to the bendable area, the pattern area is provided with a plurality of slits parallel to each other, and at least one of the plurality of slits is filled with a glue strip.

15. The back plate assembly according to claim 14, wherein: At least one slit has a first end and a second end opposite to each other along its extension direction, wherein the first end is a closed end; and the second end is an open end and passes through the side edge of the back plate.

16. The back plate assembly according to claim 15, wherein: The width of the first end portion is greater than the width of the second end portion.

17. The display module according to claim 15, wherein: On either side along the extending direction of the plurality of slits, the first end portions and the second end portions of the plurality of slits are alternately arranged.

18. The back plate assembly according to claim 15, wherein: The light transmittance of the adhesive strip is less than 10%.

19. The back plate assembly according to claim 15, wherein: In a cross section perpendicular to the back plate and perpendicular to the extending direction of the slit, the width of the adhesive strip gradually increases in a direction away from the adhesive layer.

20. A display device comprising the display module according to any one of claims 1-10.

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